Vibro compaction by depth vibrator
The vibro compaction technique compacts granular soils, by rearrangement of the soil particles into a denser state. The depth vibrator is a horizontal oscillating cylindrical body. The core element of the vibrator is an electrically driven eccentric weight which induces the horizontal oscillation of the vibrator. Under the influence of the induced vibration, the soil particles within the zone of influence are rearranged and compacted. The vibro compaction increases density and stiffness of the compacted soil, which in turn gives rise to homogenized subsoil, reduced settlement, and enhanced load-bearing capacity. The global aim of the research project is to provide a better fundamental understanding of the dynamic movement behaviour of depth vibrators. Furthermore the dynamic movement behaviour of the depth vibrator ought to deliver information about the current soil properties during the compaction process.
Experimental field tests with extensive measurements, as well as theoretical modeling and numerical simulation of the depth vibrator-subsoil interaction system are performed to develop the theoretical basics of an application-oriented, work integrated compaction control system.
The present research project funded by the Austrian Research Promotion Agency (FFG), within the scope of the funding program EraSME, as a collaborative effort between the Institute of Geotechnics of the Vienna University of Technology, the Unit of Applied Mechanics of the University of Innsbruck, Keller Grundbau Österreich Ges.mbH and VCE Vienna Consulting Engineers ZT GmbH.
Proj.Ass. Dipl.-Ing. Dr.techn. Peter Nagy, BSc